import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { PassportStrategy } from '@nestjs/passport';
import { ExtractJwt, Strategy } from 'passport-jwt';
import { PrismaService } from '../prisma/prisma.service';
import { displayName } from '../common/mobile.util';

export type JwtPayload = {
  sub: string;
  mobile: string;
  role: string;
};

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
  constructor(
    config: ConfigService,
    private readonly prisma: PrismaService,
  ) {
    super({
      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
      ignoreExpiration: false,
      secretOrKey: config.get<string>('JWT_SECRET', 'dev-secret'),
    });
  }

  async validate(payload: JwtPayload) {
    const user = await this.prisma.user.findUnique({
      where: { id: payload.sub },
      select: {
        id: true,
        mobile: true,
        firstName: true,
        lastName: true,
        role: true,
        permissions: true,
        isActive: true,
      },
    });

    if (!user || !user.isActive) {
      return null;
    }

    return {
      ...user,
      name: displayName(user.firstName, user.lastName),
    };
  }
}